SURNAME NUNCIO. NEW AT THIS....

SURNAME NUNCIO. NEW AT THIS....

I am trying to research my paternal family name NUNCIO.I've traced my family back to my g-grandfather Nuncio who was born in Nuevo Leon, Mexico 1850's. But I don't know if his family was from SPAIN, or PORTUGAL , or the Canairy Islands ??? My g-grandfather lived his life in San Antonio, Texas. Some of his family lived in Louisiana.Does anyone Know if the name NUNCIO is very much in SPAIN? , PORTUGAL ? or the C. ISLANDS ?? If so what Parts ??? I am new to this research and ANY HELP is very appreciated. Thank You.